Organizers of the Ulman Cancer Fund for Young Adults announced the cyclist will race in their Half Full Triathlon on Oct. 7 alongside fellow cancer survivors in and around Centennial Park.

"I couldn’t be more excited to welcome Lance back to my hometown to support an event benefiting the organization I created with my family in college," Doug Ulman, the Fund founder and president and CEO of the Lance Armstrong Foundation said in a statement. "Lance's support of the Ulman Cancer Fund and the young adult cancer movement has been and continues to be invaluable."

Earlier this month, Armstrong was told he could not run in the Chicago marathon with cancer survivors because of the recent doping agency ruling.

The champion cyclist was stripped of his seven Tour de France titles. The USADA officially charged Armstrong with doping earlier this summer.

Armstrong has been a big supporter of the Ulman Cancer Fund -- one of its largest donors, officials say. He gave the charity $100,000 in 2007 for a young adult patient navigation program in the Baltimore/Washington area.